In Search of Light
The Nome King tries to stop them, but Ozma uses the Magic Belt on him. He succumbs to defeat.
Aired 06/07/1987EP 40 - In Search of Light
1986
The Wonderful Wizard of Oz
Based on The Wonderful Wizard of Oz (1900), The Marvelous Land of Oz, Ozma of Oz, and The Emerald City of Oz (1900-1920) by L. Frank Baum (1856-1919).
(Source: AniDB)